Due to the surface retardation, the attenuation rate of velocity becomes quicker, which depends on water depth and jet width.

由于水面的阻滞，中轴线上垂向速度的衰减较自由射流快，衰减规律随水深和射流宽度而异。

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The width of the reservoir illustrated here is approximately 8 kilometers (5 miles); a jet flying over the reservoir left a contrail midway between the shorelines.

图片中显示出的水库宽度大约为8千米（5英里），一架从上方飞过的飞机在水库两岸之间留下了一条航迹云。

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In addition, plasma jet from the form into consideration, the jet from the gun in diameter is expands outward, nozzle increase in altitude inevitably lead to increased width incision.

另外，从等离子射流的形态方面考虑，射流直径在离开枪口后是向外膨胀的，喷嘴高度的增加必然引起切口宽度加大。

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